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Asteroid 7 Iris

Available Resources

Asteroid 7 Iris Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 7 Iris in Virgo on January, 22 2019
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
13h 11m 43s
-14° 19’ 33”

Asteroid 7 Iris Rise and Set Times

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 104.3°
Max altitude: 24.2°
Azimuth: 255.7°

Asteroid 7 Iris Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Jan 15 13h 07m 46s -13° 40’ 41” 10.65 Virgo
2019 Jan 16 13h 08m 22s -13° 46’ 10” 10.64 Virgo
2019 Jan 17 13h 08m 57s -13° 51’ 34” 10.63 Virgo
2019 Jan 18 13h 09m 29s -13° 56’ 52” 10.62 Virgo
2019 Jan 19 13h 10m 00s -14° 02’ 02” 10.61 Virgo
2019 Jan 20 13h 10m 31s -14° 07’ 05” 10.60 Virgo
2019 Jan 21 13h 11m 00s -14° 12’ 02” 10.59 Virgo
2019 Jan 22 13h 11m 27s -14° 16’ 50” 10.57 Virgo
2019 Jan 23 13h 11m 54s -14° 21’ 33” 10.56 Virgo
2019 Jan 24 13h 12m 20s -14° 26’ 08” 10.55 Virgo
2019 Jan 25 13h 12m 43s -14° 30’ 35” 10.54 Virgo
2019 Jan 26 13h 13m 06s -14° 34’ 55” 10.53 Virgo
2019 Jan 27 13h 13m 27s -14° 39’ 07” 10.51 Virgo
2019 Jan 28 13h 13m 48s -14° 43’ 12” 10.50 Virgo

Distance of Asteroid 7 Iris from Earth

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 7 Iris from Earth between January 2013 and December 2075

Light Curve of Asteroid 7 Iris

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and December 2075

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 26 April 2019 00:00 UTC (JD: 2458600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23120579
Orbit inclination i 5.52365144°
Perihelion distance q 1.83383083 AU
274,337,188 km
Aphelion distance Q 2.93683680 AU
439,344,533 km
Semi-major axis a 2.38533381 AU
356,840,860 km
Orbital period period 3.6800 years
1,345.6192 days
Date of perihelion transit Tp 2017-Nov-18 03:14:27
2,458,075.6350 JD
Next perihelion transit 2021-Jul-25 18:06
2,459,421.2542 JD
Argument of perihelion peri 145.26510345947°
Longitude of the ascending node node 259.56323263803°
Mean anomaly M 140.41965536039°
Mean motion n 0.26753483°/day
Closest approach to Earth* 2017-Oct-31
Distance of closest approach* 0.84895471 AU
127,001,816 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.